<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script>
			{
				var name = 'lb';
				let age = 25;
			}
			console.log(name);	// 输出lb
			console.log(age);	// 
			
		</script>
	</head>
	<body>
	</body>
</html>
